申请人:Sumitomo Chemical Company, Limited
公开号:US04371711A1
公开(公告)日:1983-02-01
A method of producing a 4-hydroxycyclopentenone represented by the formula, ##STR1## wherein R.sub.1 is an alkyl, alkenyl, alkynyl, cycloalkyl, thienyl, phenyl, p-methylbenzyl or benzyl group and R.sub.2 is an alkyl, alkenyl or alkynyl group having 6 or less carbon atoms, which comprises reacting a furylcarbinol compound of the formula, ##STR2## wherein R.sub.1 is as defined above, in the presence of an acid in a mixed solvent of water and an organic solvent, to obtain a cyclopentenone compound of the formula, ##STR3## wherein R.sub.1 is as defined above; reacting the cyclopentenone compound in the presence of an oxidizing agent to obtain a cyclopentendione compound of the formula, ##STR4## wherein R.sub.1 is a defined above; reacting the cyclopentendione compound with a Grignard reagent of the formula, R.sub.2 MgX wherein R.sub.2 is as defined above and X is chlorine, bromine or iodine atom, to obtain an oxocyclopentene compound of the formula, ##STR5## wherein R.sub.1 and R.sub.2 are as defined above; and reacting the cyclopentenone compound in the presence of a base. The 4-hydroxycyclopentenones are useful intermediates of agricultural chemicals.
生产4-羟基环戊烯酮的方法,其化学式表示为,其中R₁是烷基、烯基、炔基、环烷基、噻吩基、苯基、对甲基苯甲基或苄基,R₂是具有6个或更少碳原子的烷基、烯基或炔基,包括在水和有机溶剂的混合溶剂中,在酸的存在下将具有以下化学式的呋喃基醇化合物进行反应,其中R₁如上定义,以获得具有以下化学式的环戊烯酮化合物;在氧化剂的存在下将环戊烯酮化合物进行反应,以获得具有以下化学式的环戊二酮化合物,其中R₁如上定义;将环戊二酮化合物与具有以下化学式的格氏试剂R₂MgX进行反应,其中R₂如上定义,X为氯、溴或碘原子,以获得具有以下化学式的氧代环戊烯化合物,其中R₁和R₂如上定义;在碱的存在下将环戊烯酮化合物进行反应。4-羟基环戊烯酮是农药化学品的有用中间体。